That's funny. You don't once mention 'college students' in your original post. Since when is 'educated people' synonymous with 'college students?' There are lots of educated overseas Chinese who haven't been college students in decades. I guess you weren't talking about them because you know that your post would've made no sense if you were.
I responded to your claim about how "every Chinese person...was unaware that North Korea invaded South Korea." That statement is simply unbelievable. Chinese know that they participated in the Korean War, and they know why the Korean War happened. And, when the U.S. makes up nearly 80% of the non-RoK forces, it's kind of hard to think that you're somehow "not" fighting the U.S. You know? I'll give you that most Chinese probably don't know the exact fatality count in the Korean War. But, to say that the war is pointless highlights your Western bias. Do you really think that the CCP would tolerate a U.S. military base located in North Korea? And, again, my father is well aware that MacArthur threatened to nuke China. I really doubt he's an exception among his generation.
No, the PLA entering Tibet was not an invasion. That you say it is indicates your lack of knowledge about modern Chinese history. Tibet claimed to be independent after the fall of the Qing in 1911, but neither the RoC nor the PRC ever accepted that. No modern Chinese government has ever signed a treaty recognizing Tibetan independence. By contrast, the PRC did agree to forever cede all claims to Mongolia. The Tibetans had a chance to force the Chinese to recognize their independence in 1914, but they didn't take it. The Union sure as hell didn't think it was invading the Confederate States in the U.S. Civil War, but under your logic, they did invade.
Do you know for a fact that history classes in China do not cover the 1962 Sino-Indian War? No, you don't. And, hell, neither do I. All I know is that it is extremely unlikely that people of my father's generation, who left China in their twenties and thirties and are now in their forties and fifties, are unaware that India and China fought a war in 1962 and that the Chinese and the Soviets split over ideology during the same decade. If you grew up under Mao, you knew that he bitched at the Soviets. It's just that simple.
Under your logic, the U.S. lost the Korean War. That's a minority position at best. The consensus is that the U.S. tied in the Korean War; it neither won nor lost. And, that is the consensus on the Sino-Vietnamese War. Of course, you are well within your right to adopt a minority view. What's more, I'll give you that the Sino-Vietnamese War isn't all that well known among younger Chinese. I only ask that you recognize that older Chinese are well aware that China fought a war with Vietnam in the 1980s.
You simply haven't met enough Chinese. 'Educated people' consists of more than just current 'college students.' Talk to some 'college graduates,' both recent and old, and then come back to me and say that almost all Chinese you've met know nothing about their country's history.